I had to stop waiting for inspiration years ago, the little devil is not a very fast friend and is indeed a fickle fair weather friend. IF I wait for her to come knocking at my door I'd never get anything done, so I've learned to reign her in and keep her to my schedule as much as I can.
I invite her in in the mornings and when I am done with her, I send her on her way. Now I am the fickle friend to Inspiration.
You must be one skilful master!